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Re: [MMUSIC] [Gen-art] Genart last call review of draft-ietf-mmusic-msrp-usage-data-channel-21

Alissa Cooper <alissa@cooperw.in> Thu, 13 August 2020 00:50 UTC

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From: Alissa Cooper <alissa@cooperw.in>
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Date: Wed, 12 Aug 2020 20:50:36 -0400
Cc: Christer Holmberg <christer.holmberg@ericsson.com>, "gen-art@ietf.org" <gen-art@ietf.org>, "draft-ietf-mmusic-msrp-usage-data-channel.all@ietf.org" <draft-ietf-mmusic-msrp-usage-data-channel.all@ietf.org>, "last-call@ietf.org" <last-call@ietf.org>, "mmusic@ietf.org" <mmusic@ietf.org>
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To: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Subject: Re: [MMUSIC] [Gen-art] Genart last call review of draft-ietf-mmusic-msrp-usage-data-channel-21
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Brian, thanks for your review. Christer, thanks for addressing Brian’s comments. I entered a No Objection ballot.

Alissa


> On Jul 13, 2020, at 4:51 PM, Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
> 
> Thanks Christer, that all looks good to me,
> 
> Regards
>   Brian
> 
> On 13-Jul-20 20:58, Christer Holmberg wrote:
>> Hi Brian,
>> 
>> Thank You for the review! Please see inline.
>> 
>> 
>> Nits:
>> -----
>> 
>>>> 4.1.  MSRP URI
>>>> ....
>>>>    transport  /= "dc"
>>>> 
>>>> I see that RFC7977 takes a slightly different approach to updating the ABNF:
>>>> 
>>>>    transport  =  "tcp" / "ws" / 1*ALPHANUM
>>>> 
>>> The advantage of listing out
>>> 
>>> transport  =  "tcp" / "ws" / "dc" / 1*ALPHANUM
>>> 
>>> would be that the reader sees the full list.
>> 
>> The MMUSIC WG has previously decided to take the approach of only writing the new value, using the "/=" format.
>> 
>> ---
>> 
>>>>                 ; Add "dc" to existing transports per [RFC4975]
>>>> 
>>>> I suggest
>>>> 
>>>>                ; Add "dc" to existing transports per Section 9 of [RFC4975]
>> 
>> Will modify as suggested.
>> 
>> ---
>> 
>>>> 4.6.  Session Closing
>>>> 
>>>>  The SDP answerer must ensure that no dcmap or dcsa attributes are
>>>>  present in the SDP answer if no corresponding attributes are present
>>>>  in the received SDP offer.
>>>> 
>>>> Should that be MUST?
>> 
>> The reason for "must" is that is referring to generic data channel SDP O/A procedures.
>> 
>> I suggest to remove the paragraph.
>> 
>> ---
>> 
>>>> B2BUA
>>>> 
>>>> Define the acronym please.
>> 
>> We normally don't do that in MMUSIC specifications. Also, it is on the IETF list of well-known acronyms.
>> 
>> Having said that, I am fine to enhance it on first occurrence: 'Back-to-Back User Agent (B2BUA)'
>> 
>> ---
>> 
>>>> 9.2.  Subprotocol Identifier MSRP
>>>> 
>>>>  A reference to this document is added to the subprotocol identifier
>>>>  "msrp" in the "WebSocket Subprotocol Name Registry"
>>>> 
>>>> s/this document/RFCXXXX/
>> 
>> Will modify as suggested.
>> 
>> ---
>> 
>>>> 11.  CHANGE LOG
>>>> 
>>>> Mark this section for deletion by the RFC Editor
>> 
>> I think the RFC Editor will delete it by default, but we can add explicit text.
>> 
>> Regards,
>> 
>> Christer
>> 
> 
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